The International Thermonuclear Experimental Reactor remote-handling (ITER-RH) system powered by water hydraulics is a vision of the future. The 2D servo valve is a new type of servo valve, maybe suitable for the ITER-RH system. It has many advantages, including its fast response and strong anti-pollution ability. However, steady flow force is currently considered to be one factor that impacts the dynamic characteristics of servo valves. In this study, the influence of steady flow force on the dynamic characteristics was analyzed, and the structure was optimized accordingly. A mathematical model of the servo valve was built using theoretical analysis and numerical simulation. Results indicated that the amplitude bandwidth of the 2D water hydraulic servo valve was 169 Hz without considering the steady flow force, and it decreased to 162 Hz when the steady flow force was considered. Furthermore, a newly designed valve sleeve, to compensate for the axial steady flow force, was proposed by changing the angle of the inlet port designed in the valve sleeve to the spool axis. The maximum compensation capacity of the axial steady flow force was 35%, and the best angle of the inclined holes was approximately 120°. The optimized amplitude bandwidth of the 2D servo valve was 167 Hz. The results demonstrate that the optimized valve sleeve improved the dynamic response of the 2D servo valve.

由水液压驱动的国际热核实验反应堆远程处理 (ITER-RH) 系统是对未来的展望。二维伺服阀是一种新型的伺服阀，可能适用于ITER-RH系统。它具有许多优点，包括响应速度快和抗污染能力强。然而，稳流力目前被认为是影响伺服阀动态特性的因素之一。本研究分析了稳流力对动力特性的影响，并对结构进行了相应的优化。通过理论分析和数值模拟建立了伺服阀的数学模型。结果表明，在不考虑稳流力的情况下，二维水液压伺服阀的幅度带宽为169 Hz，当考虑稳定流动力时，它下降到 162 Hz。此外，通过改变阀套中设计的入口与阀芯轴线的角度，提出了一种新设计的阀套，以补偿轴向稳流力。轴向稳流力的最大补偿能力为35%，斜孔最佳角度约为120°。二维伺服阀的优化幅度带宽为 167 Hz。结果表明，优化后的阀套改善了二维伺服阀的动态响应。轴向稳流力的最大补偿能力为35%，斜孔最佳角度约为120°。二维伺服阀的优化幅度带宽为 167 Hz。结果表明，优化后的阀套改善了二维伺服阀的动态响应。轴向稳流力的最大补偿能力为35%，斜孔最佳角度约为120°。二维伺服阀的优化幅度带宽为 167 Hz。结果表明，优化后的阀套改善了二维伺服阀的动态响应。